广东水利水电Issue(6)：13-17,5.
1996-2025年梅州市"龙舟水"的特征分析
Analysis of the Characteristics of"Dragon Boat Water"in Meizhou City from 1996 to 2025
摘要
Abstract
Based on the daily precipitation data of the"Dragon Boat Water"period(May 21 to June 20)from 1996 to 2025 observed from 7 national surface meteorological stations in Meizhou City,this study analyzed its temporal and spatial characteristics by using methods including linear trend analysis,moving average and Morlet wavelet analysis.The results show that:①The average rainfall of Dragon Boat Water in Meizhou is 286.9 mm,with 24.8 rainy days and rainfall intensity of 11.4 mm/d,showing significant interannual variation,and the extreme ratio of rainfall reaches up to 4.9 times.②The interannual variation of Dragon Boat Water rainfall presents a pattern of two troughs and two peaks.Normal years with 150-300 mm account for 60%,while extremely excessive years only account for 10%.③Heavy rainfall is concentrated from June 8 to 17,accounting for 43.3%of the total rainfall.④The number of rainstorm days,annual average and maximum rainfall all show upward trends in the old and new 30-year periods,with a spatial pattern of"more in the north and south,less in the middle".The annual average rainstorm days in recent 30 years is 7.9 d,which has a significantly positive correlation with precipitation(r=0.83).⑤Wavelet analysis indicates that there is a quasi-3-year cycle from 1983 to 1995 and a quasi-8-year cycle from 2000 to 2016,both passing the 0.05 significance test and serving as the main oscillation periods.关键词
龙舟水/气候特征/时空分布/梅州市Key words
dragon boat water/climatic characteristics/temporal and spatial distribution/Meizhou city分类
天文与地球科学引用本文复制引用
魏伟晓,罗碧瑜,张晴雯,刘雯丽,廖庆佳..1996-2025年梅州市"龙舟水"的特征分析[J].广东水利水电,2026,(6):13-17,5.基金项目
梅州市气象局科研项目(编号:2025Z01). （编号:2025Z01）
